Kuniwak/vint — pull request #57 by Kuniwak (2014-12-19 12:10:48+00:00)
Title: Make invalid severity tolerance

```
Traceback (most recent call last):
File "bin/vint", line 25, in
vint.main()
File "/Users/####/Development/vint/vint/__init__.py", line 20, in main
config_dict = _build_config_dict(env)
File "/Users/####/Development/vint/vint/__init__.py", line 48, in _build_config_dict
ConfigGlobalSource(env),
File "/Users/####/Development/vint/vint/linting/config/config_file_source.py", line 12, in __init__
self._config_dict = self.convert_config_dict(yaml.load(file_obj))
File "/Users/####/Development/vint/vint/linting/config/config_file_source.py", line 22, in convert_config_dict
cmdargs_dict['severity'] = Level[cmdargs_dict['severity'].upper()]
```